Factors that account for marginalisation in Africa

“Sub-Saharan African countries' own trade and transport policies incorporate a substantial anti-export bias.” transport problems might have contributed to the relative decline of sub-Saharan Africa's exports in global trade, and whether domestic freight and transport policies have been a contributing factor.

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.

speed

explanation: